--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/file/Files/SkipSiblings.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.io.IOException;
+import java.util.*;
+
+/**
+ * Unit test for Files.walkFileTree to test SKIP_SIBLINGS return value.
+ */
+
+public class SkipSiblings {
+
+    static final Random rand = new Random();
+    static final Set<Path> skipped = new HashSet<Path>();
+
+    // check if this path's directory has been skipped
+    static void check(Path path) {
+        if (skipped.contains(path.getParent()))
+            throw new RuntimeException(path + " should not have been visited");
+    }
+
+    // indicates if the siblings of this path should be skipped
+    static boolean skip(Path path) {
+        Path parent = path.getParent();
+        if (parent != null && rand.nextBoolean()) {
+            skipped.add(parent);
+            return true;
+        }
+        return false;
+    }
+
+    public static void main(String[] args) throws Exception {
+        Path dir = Paths.get(args[0]);
+
+        Files.walkFileTree(dir, new FileVisitor<Path>() {
+            public FileVisitResult preVisitDirectory(Path dir) {
+                check(dir);
+                if (skip(dir))
+                    return FileVisitResult.SKIP_SIBLINGS;
+                return FileVisitResult.CONTINUE;
+            }
+            public FileVisitResult preVisitDirectoryFailed(Path dir, IOException exc) {
+                throw new RuntimeException(exc);
+            }
+
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
+                check(file);
+                if (skip(file))
+                    return FileVisitResult.SKIP_SIBLINGS;
+                return FileVisitResult.CONTINUE;
+            }
+            public FileVisitResult postVisitDirectory(Path dir, IOException x) {
+                if (x != null)
+                    throw new RuntimeException(x);
+                check(dir);
+                return FileVisitResult.CONTINUE;
+            }
+            public FileVisitResult visitFileFailed(Path file, IOException x) {
+                throw new RuntimeException(x);
+            }
+        });
+    }
+}